[aqm] AQM hurts utilization with a single TCP stream?

[Simon Barber]

For throughput to be unaffected with a single TCP-Reno stream the buffer 
must grow to contain half the BDP, since the window will be halved on 
loss. With TCP-CUBIC the buffer must contain 20% of the BDP. CoDEL will 
make it's first drop when the sojourn time remains > 5ms, so with 
TCP-Reno, if the RTT is > 10ms, then utilization will be hurt. With 
TCP-CUBIC if the RTT is > 25ms then utilization will be hurt.

Is this correct?
Simon

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